EP2441953A1 - Aérogénérateur par déformation d'au moins un élément en élastomère - Google Patents

Aérogénérateur par déformation d'au moins un élément en élastomère Download PDF

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Publication number
EP2441953A1
EP2441953A1 EP11185183A EP11185183A EP2441953A1 EP 2441953 A1 EP2441953 A1 EP 2441953A1 EP 11185183 A EP11185183 A EP 11185183A EP 11185183 A EP11185183 A EP 11185183A EP 2441953 A1 EP2441953 A1 EP 2441953A1
Authority
EP
European Patent Office
Prior art keywords
band
wind
generator according
wind vane
elastomeric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11185183A
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German (de)
English (en)
Other versions
EP2441953B1 (fr
Inventor
Corrado Boragno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universita degli Studi di Genova
Original Assignee
Universita degli Studi di Genova
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Publication date
Application filed by Universita degli Studi di Genova filed Critical Universita degli Studi di Genova
Publication of EP2441953A1 publication Critical patent/EP2441953A1/fr
Application granted granted Critical
Publication of EP2441953B1 publication Critical patent/EP2441953B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D5/00—Other wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/70—Application in combination with
    • F05B2220/709—Piezoelectric means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy

Definitions

  • the present invention relates to a wind generator by means of deformation of at least one elastomeric capacitor.
  • elastomeric capacitors The technology of elastomeric capacitors is known and was developed for making actuators called artificial muscles, i.e. they convert electrical energy to mechanical energy.
  • An elastomeric capacitor consists of an elastomeric dielectric, i.e. it is able to deform if subjected to mechanical stress, covered on two faces with a conductive material that is able to follow the mechanical deformations of the elastomer.
  • the electrical energy available at the end of the deformation phase is greater than that required for charging the capacitor, as the mechanical energy accumulated during deformation is converted to electrical energy.
  • the aim of the present invention is to provide a wind generator that utilizes the aforementioned phenomenon of conversion of mechanical energy to electrical energy, when the mechanical deformation is due to the wind, supplying precise indications and design parameters of an actually functioning generator.
  • the present invention relates to a wind generator by means of deformation of at least one elastomeric capacitor, according to claim 1.
  • the present innovation allows the concrete development of a novel category of wind generators which, at least for low and medium power applications (1-10 kW), do not require equipment of large dimensions such as that required for the usual wind generators with rotating blades and with efficient conversion of mechanical energy to electrical energy.
  • the generator of the present invention can comprise one or more bands of elastomeric material covered on the corresponding two faces with a conductive material to define an elastomeric capacitor and fixed at the ends in order to remain extended.
  • the action of the wind causes vibrations and oscillations in the band, which is induced to alternating phases of extension and contraction.
  • band(s) define an elastomeric capacitor, electrical energy can be produced by the latter.
  • the bands of elastomeric material can be for example:
  • the first type is known and is commercially available.
  • the generator according to the three preferred variants of the invention, comprises:
  • the ends of the band(s) can be fixed for example to a pair of supporting elements S that keep the longitudinal extension of the band(s) transverse to the direction of the wind with the faces parallel to a direction of the wind.
  • the wind vane is in both cases fixed to the bands on one edge. Connection can be provided between wind vane and band N by partial overlap between them, fastening the surfaces in contact between them. In this way, the action of the wind vane, moved by the wind, is transmitted more efficiently to the band.
  • these are parallel to one another and arranged so that they belong to one and the same plane.
  • the interaction with the fluid causes a periodic motion of the band(s).
  • the deformation induced in the elastomeric capacitors passes from a state of maximum deformation to one of complete relaxation.
  • the wind vane under the action of the wind, tends to rise and fall, inducing elongation and twisting in the band(s).
  • the wind vane can also be connected to the bands in different ways so as to favour twisting or elongating stresses in the band.
  • an end portion of a surface of the wind vane B is attached to a face of the first band N.
  • two opposite end portions, for example, of one and the same face are connected to the two parallel bands, in the respective middles.
  • the first variant with a single band and without wind vane, has low efficiency and motion that is irregular and of small amplitude. It can, however, find application in simple devices.
  • the configurations including the wind vane are found to be more efficient, leading to deformations of up to 10% of the band(s) with a wind of about 3 m/s.
  • the weight of the wind vane positioned at the centre of the band there, to be at least equal to 10 times the weight of the band, in order to increase its deformation significantly.
  • the stress applied to the band can be applied by means of a suitable electromechanical system able to regulate the stress applied to the band in relation to the wind speed, which can be measured, for example, by an anemometer, or obtained from real-time analysis of the voltage signal produced by the generator.
  • the wind vane can be rigid or semi-rigid and can have a plain profile or an airfoil section, in order to induce the maximum possible stressing on the elastomeric elements even at modest wind speeds.
  • Fig. 3 shows the trace, obtained with a digital oscilloscope, of the increase in capacitance of the capacitor as a result of deformation induced by interaction with air in motion.
  • Fig. 3 shows measurements taken on a test band.
  • the terminals of the elastomeric capacitor were connected in a Wien bridge for measurement of capacitance of the capacitor.
  • the bottom curve shows the voltage value that is obtained when the elastomeric capacitor is at rest;
  • the middle curve shows the voltage value that is recorded at the terminals of the elastomeric capacitor to which a conventional capacitor of capacitance 20 pF is connected in parallel: this curve is used for comparison;
  • the top curve (asterisks) shows the voltage value that is obtained when the wind impinges on the elastomeric capacitor.
  • This curve reveals a percentage change in capacitance of the elastomeric capacitor of approx. 5%, corresponding to the measured percentage deformation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)
  • Motor Or Generator Frames (AREA)
EP20110185183 2010-10-15 2011-10-14 Aérogénérateur par déformation d'au moins un élément en élastomère Not-in-force EP2441953B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2010A001889A IT1402038B1 (it) 2010-10-15 2010-10-15 Generatore eolico mediante deformazione di almeno un condensatore elastomerico

Publications (2)

Publication Number Publication Date
EP2441953A1 true EP2441953A1 (fr) 2012-04-18
EP2441953B1 EP2441953B1 (fr) 2013-12-25

Family

ID=43738016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110185183 Not-in-force EP2441953B1 (fr) 2010-10-15 2011-10-14 Aérogénérateur par déformation d'au moins un élément en élastomère

Country Status (2)

Country Link
EP (1) EP2441953B1 (fr)
IT (1) IT1402038B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20163569A1 (it) * 2016-05-18 2017-11-18 Nwhisper S R L S Dispositivo trasduttore di energia fluidodinamica in energia elettromotrice

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060113878A1 (en) * 1999-07-20 2006-06-01 Sri International Electroactive polymers
US20070008572A1 (en) 2005-07-08 2007-01-11 Konica Minolta Business Technologies, Inc. Image forming apparatus and image management method
US20080129254A1 (en) * 2006-12-01 2008-06-05 Frayne Shawn M Generator utilizing fluid-induced oscillations
WO2008151008A1 (fr) * 2007-05-30 2008-12-11 Humdinger Wind Energy, Llc Convertisseurs d'énergie utilisant des oscillations induites par un fluide
WO2009106836A2 (fr) * 2008-02-28 2009-09-03 Aws Ocean Energy Ltd Appareil et procédé d'extraction d'énergie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060113878A1 (en) * 1999-07-20 2006-06-01 Sri International Electroactive polymers
US20070008572A1 (en) 2005-07-08 2007-01-11 Konica Minolta Business Technologies, Inc. Image forming apparatus and image management method
US20080129254A1 (en) * 2006-12-01 2008-06-05 Frayne Shawn M Generator utilizing fluid-induced oscillations
WO2008151008A1 (fr) * 2007-05-30 2008-12-11 Humdinger Wind Energy, Llc Convertisseurs d'énergie utilisant des oscillations induites par un fluide
WO2009106836A2 (fr) * 2008-02-28 2009-09-03 Aws Ocean Energy Ltd Appareil et procédé d'extraction d'énergie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20163569A1 (it) * 2016-05-18 2017-11-18 Nwhisper S R L S Dispositivo trasduttore di energia fluidodinamica in energia elettromotrice

Also Published As

Publication number Publication date
EP2441953B1 (fr) 2013-12-25
IT1402038B1 (it) 2013-08-28
ITMI20101889A1 (it) 2012-04-16

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